Eyeglass-mounting



C. M. HAYNES.

EYEGLASS MOUNTING.

APPLICATION FILED DEC. I7, 1919.

1,342,808. hmmm s, 1920.

[flue/liar l/fl'zzar/zeys UNITED STATES CHARLES M. HAYNES, 0F CHILLICOTHE, OHIO.

EYEGLASS-MOUNTING.

Leeaees.

Application filed December 17, 1919.

Be it known that I, CHARLES M. HAYNES, a citizen of the United States of America, residing' at Chillicothe, in the county of Ross and VState of Ohio, have invented certain new and useful Improvements in Eyeglass-Mountings, of which the following is a full, clear, and exact description.

rllhis invention relates to finger -piece mountings for eyeglasses in which a removable screw is used to retain the lever` :and cooperating spring in place. To prevent loosening of the screw by repeated rocking of the finger-piece lever it is customary to rivet the screw in place, as by peening its end, but in subsequent removal of the screw, as is often necessary in making repairs, the peened end of the screw is very apt to injure the female threads and may even make them fail to hold properly. It is accordingly the object of my present invention to provide a mounting of such characterv that the screw can be riveted in place or secured in an equivalent manner and yet can be removed without the injury to its own or to the female threads. To this and other ends the invention consists inthe novel features and combinations hereinafter described.

One form of the invention is illustrated in the accompanying drawing, in which it is shown applied to a popular type of fingerpiece mounting now on the market.

Figure 1 is a front view of a portion of the mounting, partly in section.

Fig. 2 is a view of a portion of the bridge, partly in section.

F ig. 3 is an elevation of the screw.

lIn the drawing, 1() is a bridge having any suitable means for holding the lens 11, as the arms 12 and strap 13.

On the bridge, between the bow and the lens-holding means, is a vertical post 14, preferably integral therewith or otherwise permanently mounted thereon. Fulcrumed on the post is a finger-lever 15, which is provided with a sleeve 16 fitting the post to permit free rocking of the lever on its fulcrum but prevent play in other directions and also to afford large wearing surface so that the mounting can be used fora long time without developing objectionable looseness. A spring 17 is provided, encircling the sleeve 16, with one end engaging the lever and the other engaging the bridge or a part of the bridge, saj.7 one of the arms to urge the lever in the proper direction for Specification of Letters Patent.

Patented June 8, 1920. semi No. 345,618.

gripping the nose when the worn.

The lever 15 and spring 17 are retained in place by a headed screw 18 threaded in a hole 19 in the post 14. According to the present invention the lower portion 20 of the hole or bore (which portion is preferably the longer) is of less diameter than the upper, and is preferably unthreaded, and the screw is of corresponding shape, having an upper threaded portion 21 and a lower unthreaded portion 22 of less diameter but longy enough, preferably, to extend slightly eeyond the lower surface of the bridge. The screw being seated, the lower end is spread, as by riveting or peening, into Hrm engagement with the bridge, thereby locking it firmly in place, and effectually resisting any tendency to be loosened by the friction of the spring 17, or sleeve 16, or both, on the underside of the head. On the other hand, when it is unscrewed the peened end cannot injure the threads of the hole 19 since the peened end is of too small diameter to cngage the threads or is compressed to a suiliciently small diameter in its movement up through the unthreaded portion of the hole.

l convenient method for locking the screw in place is to have its lower end split, as indicated at 23, Fig. 3. Then when the screw is seated it is peened or riveted by spreading its split end, as shown in F ig. 1, by means of small screwdriver or other suitable tool.

The construction shown is also convenient in assembling and reassembling the parts. In putting the screw in place the stem 22 slips into the unthreaded part of the hole and holds the screw upright, thus making iteasy for the threads to engage withoutcrossing, and preventing the screw from being tipped out of the hole in trying to turn it with the screwdriver.

lt is to be understood that the invention is not limited to the specific construction herein described but can be embodied in other forms without departure from its spirit.

I claim:

1. 1n an eyeglass mounting, a bridge and a post thereon having a hole extending through the post and the bridge, the upper part of the hole being threaded and the lower part unthreaded and of less diameter than the upper, a finger lever fulcrumed on the post, and a retaining screw seated in glasses are the screw said hole, the lower portion of the screw being unthreaded and of less diameter than the upper portion, and the end of the said lower portion of the screw being spread into firm engagement with the bridge to prevent loosening of the screw.

2. In an eyeglass mounting, a bridge and a post thereon having a hole extending through the bridge, the upper part of the hole being threaded and the lower portion unthreaded and of less diameter than the upper, a finger lever fulcrumed on the post, and a retaining screw seated in said hole, the lower portion of the screw being unthreaded and of less diameter than the upper portion, the end of the lower portion of being split and spread iirmly `against the bridge to prevent loosening of' the screw.

3. In an eyeglass mounting, a one-piece bridge having a fulcrum for a finger lever rovided with a the bridge, the upper part of the hole being threaded and the lower portion unthreaded and of less diameter than the upper, a finger lever mounted on said fulcrum, and a retaining screw seated in said hole, having a lower portion of reduced diameter extending through the unthreaded part of the hole and having its lower end spread firmly into engagement with the bridge to prevent loosening of the screw.

4L. In an eyeglass mounting, a bridge having a fulcrum for a finger lever provided hole extending through i with a hole extending through the bridge and of less diameter at the bottom than at the top, the upper part of the hole being threaded, a linger fulcrum, and a retaining screw seated in the hole, corresponding to the hole in shape and extending through the bridge, and having its lower' end spread firmly against the bridge to prevent loosening of the screw.

5. In an eyeglass mounting, a one-piece bridge having an Vintegral post forming a fulcrum for a finger lever and provided with a hole extending through the bridge, the upper portion of the hole being threaded and 'of greater diameter than the lower portion,

a finger lever mounted on kthe fulcrum, and a retaining screw seated in the hole, corre sponding thereto in shape and extending through the bridge and having its lower end spread into firm engagement with the bridge to prevent loosening of the screw.

6. In an eyeglass mounting, a bridge provided with a hole extending through the bridge and having its upper portion threaded, a finger lever, a retaining screw extending through the lever and threaded in said upper portion of the hole, the lower portion of the screw being smaller than the said upper portion of the hole and adapted to be spread at its lower end to lock it in Y place.

In testimony whereof I hereunto affix my signature.

CHARLES M. I-IAYNES.

lever mounted on said 

